Encrustation and element content (Ca, Fe, K, Mg and P) of charophytes was studied along plant thalli to investigate the dependency of thallus age and site-specificity. Charophytes were collected from five sampling sites (Angersdorfer Teiche, Asche, Bruchwiesen, Krüselinsee and Lützlower See) which were distinct with respect to water chemistry. Furthermore, photosynthesis was measured to identify the physiological state of plants in habitat waters and with the addition of different ion concentrations (Ca2+, K+, Mg2+ and Na+). Age pattern on encrustation of charophytes was site-specific: carbonate content increased from the youngest to the oldest part (Angersdorfer Teiche), younger parts were less encrusted than older parts in Asche, Bruchwiesen and Krüselinsee, whereas encrustation in Lützlower See was the same along plants thallus. Charophytes showed species-specific encrustation in investigated sites. Encrustation of C. hispida in Angersdorfer Teiche was also as high as of individuals from hard-water lakes irrespective of 10.15 mS cm-1 (salinity of 6.3). For species growing in Angersdorfer Teiche, K/Na content and photosynthesis was lowest when compared to other sites. Photosynthesis of charophytes was enhanced after the addition of KCl and adversely affected by CaCl2, MgCl2 and NaCl. In summary, it was shown that encrustation of charophytes in water sites with strong ion anomalies could be as high as in hard-water lakes. It is assumed that ion composition, rather than ion concentration of Na+, Mg2+ and SO42-, impact on the encrustation of charophytes. The age pattern on encrustation in this study showed a strong site-specificity, whereas encrustation of charophytes was species-specific. Ion concentrations, either of habitats or actively added in laboratory measurements, impact on encrustation, element content and photosynthesis of charophytes.

中文翻译：

---

藻土的结壳的年龄和特定位置的模式。

研究了沿植物thalli的藻土的结壳和元素含量（Ca，Fe，K，Mg和P），以研究all体年龄和部位特异性的依赖性。从五个采样点（水化学方面截然不同）（安格斯多佛•蒂切，阿什，布吕克维森，克鲁瑟林湖和吕茨洛湖）采集了风生虫。此外，还测量了光合作用以鉴定栖息地水域中植物的生理状态，并添加了不同的离子浓度（Ca2 +，K +，Mg2 +和Na +）。藻土包壳的年龄模式是针对特定地点的：碳酸盐含量从最年轻的部分增加到最老的部分（Angersdorfer Teiche），Asche，Bruchwiesen和Krüselinsee的年轻部分比老部分的结壳少，而LützlowerSee的结壳沿着相同的方向植物th。嗜藻细胞在被调查的地点显示出特定于物种的结壳。Angersdorfer Teiche的C. hispida硬壳化与来自硬水湖泊的个体一样高，而与10.15 mS cm-1无关（盐度为6.3）。对于在Angersdorfer Teiche生长的物种，与其他地点相比，K / Na含量和光合作用最低。添加氯化钾后，Caoph2，MgCl2和NaCl的添加会增强叶片的光合作用。总而言之，结果表明，在离子强异常的水位上，藻土的结壳可能与硬水湖中的高。假定离子组成而不是Na +，Mg2 +和SO42-的离子浓度会影响盐藻的结壳。在这项研究中，结壳的年龄模式显示出很强的地点特异性，而藻土的结壳是特定于物种的。离子浓度，无论是生境还是实验室测量中主动添加的离子浓度，都会对壳藻的结壳，元素含量和光合作用产生影响。